>> Overcomming IIS 6 File
Upload/Download File Size Limits.

When trying to upload files
over 200KB on IIS 6 the file may never upload and you either get
an error or are sent to a blank screen. By default Windows 2003
server limits file uploads to about 200KB in size. To overcome
this limit you must edit the IIS metabase.xml file.

Before you can edit
the metabase.xml file you must tell IIS to allow you to edit
the file. In IIS, right click the name of the server and
select properties. Check "Enable Direct Metabase Edit".

Find the metabase.xml
file located in
C:\windows\sytem32\inetserv and open the file in Notepad.

Search for
AspMaxRequestEntityAllowed and increase the value. The
default value is 204800 (200K). Setting the value to 1000000
will allow 1 MB file uploads.

You may now wish to
uncheck the IIS property called "Enable Direct Metabase Edit".

To increase the file
download size limit, repeat all steps above but in Step 3 find
the parameter called AspBufferingLimit. The default
download limit is 4MB.